You do know they come with a 3.5mm headphone jack to lightning adapter right? Apple also sells a 3.5mm headphone jack + lightning connector to lightning adapter separately as well. In addtion, decent quality BT headphones can be had for under $50 iirc.
I read that you have to choose one or the other when the new iphones were coming out. Oh well, I don't use iphone anyway. XD
On the 8 you can either use the charge and play adapter or use the lightning headphones (or lightning to 3.5) and wirelessly charge